There are quite a few differences. Clips for the seal vs staples, starter delay vs none , auto vs 4speed, ram air seals , wire rad hose clamps vs tower clamps and others I've probably missed. The 4speed "could" be a pre production prototype. The auto trans car has been in other photos. Is it possibly the same as the Hot Rod test car? Randy

why do the hoods have the F O R D letters like the 67? the 135 cars are 5 months into 1968 production so it is not an early thing. Perhaps for recognition?? I understand the hole pattern is different in the hood but are the hoods actually left over 67 units or date stamped 68 units? never thought to look when checking a couple of the cars over in the past

The radiator rubber was believe it or not standard on big block AND 6 cyl. cars....Concerning the "Hot Rod" test car, that was a ringer/prototype. Most magazine test vehicles are pre production and "set up" cars for that purpose. So some parts will not make production. This practice continues on today for print/media road tests...